Results 1 to 5 of 5

Thread: Air Compressor build with a Auto-man Air compressor head

  1. #1
    Registered User
    Join Date
    Aug 2005
    Location
    Victoria
    Posts
    1,009

    Air Compressor build with a Auto-man Air compressor head

    Came across this Automan 2 stage air compressor head for the right price.

    The data plate reads 42 Cfm with a working pressure of around 171lb

    The Automan Type is a 1004T 7B is that means anything

    I am intending on mating this to a petrol engine, therefore I will need a unloader valve to control the entire assembly.

    Looking at the pump head it appears that it has a pair of ports in the head directly over the valve gear in the head with a diaphragm valve and a threaded port. this gives me the impression that the air compressor can run in unloader mode (presumably installed on a electric system)

    Looking closely at the diaphragm valves in the head I can't see any exhaust ports venting to outside the unit. Would this mean it's bypassing the inlet valves on the head


    I guess I am looking for information on the unloader head on this unit. Or a similar unit.
    Quote Originally Posted by Marv View Post
    "1000 safari suits and matching blunderbuss, along with a 1:56 scale diorama of a porn movie set" was what I originally figured you were hiding, but I'm guessing it's probably an E30.

  2. #2
    Flogger of dead horses kneelo's Avatar
    Join Date
    Mar 2011
    Location
    Quindanning WA
    Posts
    447
    I have a big 3 phase compressor I got for free that i am doing a petrol conversion on. I've got as far as mounting the new motor so far. The plan for the unloader is an electric ball valve to vent the discharge of the compressor before the non return valve to the receiver. This will be controlled by an arduino that will also start and stop the motor and adjust the throttle. I like the idea of being able to easily adjust the running pressure the compressor depending on what I'm doing and having it start and stop by itself. The plan is to mostly use it with my sandblasting cabinet.

    You can get mechanical unloaders on ebay that vent the discharge and throttle down the motor but I like making things more complicated than they need to be.

  3. #3
    arboreal bukkake briney's Avatar
    Join Date
    Jul 2007
    Location
    Blackwater, QLD
    Posts
    1,647
    you could quite likely use a governor valve from a truck air brake setup too. some of the petrol compressors i've looked at over the years had a spring and an air ram to shut the throttle on the motor when it got up to pressure.
    Quote Originally Posted by Skompa View Post
    The throttle linkages jammed on the CDs in my old Triumph 2000 and stuck it at WOT.

    I didn't realise for about 15 mins as it never broke the speed limit.

  4. #4
    Registered Fuckwit oioioioioi's Avatar
    Join Date
    Feb 2007
    Location
    Newcastle
    Posts
    2,184
    Quote Originally Posted by kneelo View Post
    I have a big 3 phase compressor I got for free that i am doing a petrol conversion on. I've got as far as mounting the new motor so far. The plan for the unloader is an electric ball valve to vent the discharge of the compressor before the non return valve to the receiver. This will be controlled by an arduino that will also start and stop the motor and adjust the throttle. I like the idea of being able to easily adjust the running pressure the compressor depending on what I'm doing and having it start and stop by itself. The plan is to mostly use it with my sandblasting cabinet.

    You can get mechanical unloaders on ebay that vent the discharge and throttle down the motor but I like making things more complicated than they need to be.
    I was going to ask why you don't just use a standard regulator to control the running pressure instead of building a convoluted computer system to do an incredibly simply mechanical job - then you explained

  5. #5
    Registered User dnegative's Avatar
    Join Date
    Jun 2013
    Location
    Sydney
    Posts
    4,230
    Quote Originally Posted by briney View Post
    you could quite likely use a governor valve from a truck air brake setup too. some of the petrol compressors i've looked at over the years had a spring and an air ram to shut the throttle on the motor when it got up to pressure.
    Yeah, a D2 valve, cheap as fuck from every truck spare parts shop in the country
    Quote Originally Posted by cracka View Post
    Fuck I'm retarded

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •